AP US History flashcards
AP Language and Composition flashcards
AP Literature and Composition study guide from the Princeton Review

College resource books

Hidden Ivies: Thirty Colleges of Excellence by Howard and Matthew Greene (2009)
Looking Beyond the Ivy League by Loren Pope (2007)
Colleges that Change Lives by Loren Pope (2013 most recent edition)
Campus Visits and College Interviews by Zola and Norman Schneider [College Board] (2012)
Creative Colleges: A Guide for Student Actors, Artists, Dancers, Musicians, and Writers by Elaina Loveland (2013)
Cool Colleges: For the Hyper-Intelligent, Self-Directed, Late Blooming, and Just Plain Different by Donald Asher (2007)
Fiske Guide to Colleges by Edward Fiske (2012)
College Planning for Gifted Students: Choosing and Getting into the Right College by Sandra Berger (2014)
Princeton Review's The Best Colleges (2011)

Books on Gifted education

When Gifted Kids Don't have all the Answers by Jim Delisle and Judy Galbraith (2015)
The Gifted Teen Survival Guide by Delisle and Galbraith (2011)
Perfectionism: What's Bad About Being Too Good by Miriam Adderholdt and Jan Goldberg (1992)
Essential Guide to Talking with Gifted Teens by Jean Sunde Peterson (2007)
The Ultimate Guide to Summer Opportunities for Teens by Sandra Berger (2007)

In addition, I have a small fiction and non-fiction lending library.